Tập 1: Hiểu lầm về điểm số và kích thước cốc dẫn đến hỗn loạn tại nhà tắm

Rizu scores E on a practice exam and tells the girls, who assume she is talking about breast size. Kominami claims all men love large breasts. Nariyuki asks about the E, and Rizu panics, thinking he is asking about breasts. She tells him her breasts are actually G cup and Nariyuki, thinking she means her grade, panics as G doesn't exist. The misunderstandings continue until Nariyuki promises to help her improve and Rizu tells him he can touch her breasts, within earshot of her furious father. With the misunderstandings cleared up Rizu is determined to improve, then catches Nariyuki looking at her breasts anyway. Rizu and Uruka hear Fumino accidentally call Nariyuki by his first name, having done so during their stay at the inn. Uruka refuses to respond until Nariyuki calls her by her first name so everyone decides to use each other's first names. Later, due to mixed up bath signs, Nariyuki and the girls end up in the men's baths. Nariyuki's male classmates arrive, forcing the girls to hide underwater. They get a chance to escape but remain to spy after Nariyuki's classmates demand to know which girl he likes most. In the end they escape when the classmates try peeking into the girl's baths, only to be punished by Kominami. The girls thank Nariyuki for helping them escape, only for Nariyuki to upset Fumino by revealing she left her A cup bra behind. (Source: Wikipedia)

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